设X,Y满足约束条件X+Y
设X,Y满足约束条件{X-4Y
设变量x,y满足约束条件x-y>-1,x+y>1,3x-y
设x,y满足约束条件x>=0 x>=y 2x-y
设x,y满足约束条件x>=0 y>=x 4x+3y
设变量X,Y满足约束条件{X-Y+3>=0,X+Y>=0,-2
设实数X,Y满足约束条件{X+2Y等于-1;Y>等于0,则
设x,y满足约束条件x+y≤1y≤xy≥−2
设变量x,y满足约束条件x-y>=-1,x+y>=1,3x-y
设变量x,y满足约束条件x−y≥0x+y≤1x+2y≥1
设xy满足约束条件x>=0 y>=0 4x+3y=0
满足约束条件(绝对值x)+2(绝对值y)